Ukraine

The defenders of Donetsk Airport from back in the early days of the conflict were called the "Cyborgs" due to how steadfast they were in its defense, so it's not entirely unprecedented.

Not really, but I'm all for it. I have no clue how to write "Iron Man" in Ukrainian but let's go.

This seems like a good place to start. This kind of task (carrying ≈ 30 shells of ≈ 50 kg each per day) isn't really on the high-end as far as "exhausting and physically taxing" goes when you consider what soldiers go through (of course, completely depending on how far they're carried). However, it does place a significant strain on your body to do it over time. That means they can test these things for this kind of task where the soldiers should be completely capable of functioning without the exoskeleton if it doesn't work properly. That way, they get testing in non-critical situations before they can scale up the use of these to tasks that humans aren't even capable of doing without the exoskeleton once they've ensured they work properly, don't break down etc.

Looks like it's only a matter of time before we see up-armoured assault troops that can carry 100+ kg of gear and shoulder-mounted weapons while taking trenches.... must suck to be in the next batch of prospective sunflower fertiliser.

Exoskeletons have been in development for years (the DARPA program has videos from over ten years ago) what's notable about this is Ukraine has developed theirs in the middle of a war and actually put them in combat testing.

I look forward to DroneUA crushing the American MIC grift programs in the market.